forked from mrdoob/three.js
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathwebgl_interactive_lines.html
206 lines (134 loc) · 5.09 KB
/
webgl_interactive_lines.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - interactive lines</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<script src="../build/three.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
var container, stats;
var camera, scene, raycaster, renderer, parentTransform, sphereInter;
var mouse = new THREE.Vector2();
var radius = 100, theta = 0;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
var info = document.createElement( 'div' );
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = '<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - interactive lines';
container.appendChild( info );
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xf0f0f0 );
var geometry = new THREE.SphereBufferGeometry( 5 );
var material = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
sphereInter = new THREE.Mesh( geometry, material );
sphereInter.visible = false;
scene.add( sphereInter );
var lineGeometry = new THREE.BufferGeometry();
var points = [];
var point = new THREE.Vector3();
var direction = new THREE.Vector3();
for ( var i = 0; i < 50; i ++ ) {
direction.x += Math.random() - 0.5;
direction.y += Math.random() - 0.5;
direction.z += Math.random() - 0.5;
direction.normalize().multiplyScalar( 10 );
point.add( direction );
points.push( point.x, point.y, point.z );
}
lineGeometry.addAttribute( 'position', new THREE.Float32BufferAttribute( points, 3 ) );
parentTransform = new THREE.Object3D();
parentTransform.position.x = Math.random() * 40 - 20;
parentTransform.position.y = Math.random() * 40 - 20;
parentTransform.position.z = Math.random() * 40 - 20;
parentTransform.rotation.x = Math.random() * 2 * Math.PI;
parentTransform.rotation.y = Math.random() * 2 * Math.PI;
parentTransform.rotation.z = Math.random() * 2 * Math.PI;
parentTransform.scale.x = Math.random() + 0.5;
parentTransform.scale.y = Math.random() + 0.5;
parentTransform.scale.z = Math.random() + 0.5;
for ( var i = 0; i < 50; i ++ ) {
var object;
if ( Math.random() > 0.5 ) {
object = new THREE.Line( lineGeometry );
} else {
object = new THREE.LineSegments( lineGeometry );
}
object.position.x = Math.random() * 400 - 200;
object.position.y = Math.random() * 400 - 200;
object.position.z = Math.random() * 400 - 200;
object.rotation.x = Math.random() * 2 * Math.PI;
object.rotation.y = Math.random() * 2 * Math.PI;
object.rotation.z = Math.random() * 2 * Math.PI;
object.scale.x = Math.random() + 0.5;
object.scale.y = Math.random() + 0.5;
object.scale.z = Math.random() + 0.5;
parentTransform.add( object );
}
scene.add( parentTransform );
raycaster = new THREE.Raycaster();
raycaster.linePrecision = 3;
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
container.appendChild( stats.dom );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onDocumentMouseMove( event ) {
event.preventDefault();
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
theta += 0.1;
camera.position.x = radius * Math.sin( THREE.Math.degToRad( theta ) );
camera.position.y = radius * Math.sin( THREE.Math.degToRad( theta ) );
camera.position.z = radius * Math.cos( THREE.Math.degToRad( theta ) );
camera.lookAt( scene.position );
camera.updateMatrixWorld();
// find intersections
raycaster.setFromCamera( mouse, camera );
var intersects = raycaster.intersectObjects( parentTransform.children, true );
if ( intersects.length > 0 ) {
sphereInter.visible = true;
sphereInter.position.copy( intersects[ 0 ].point );
} else {
sphereInter.visible = false;
}
renderer.render( scene, camera );
}
</script>
</body>
</html>